悪い、ビール買いに行っていて遅くなった
要するにこういう感じで勝手にデストラクタが呼ばれるといけないわけだよね？

#include <iostream>
#include <boost/ptr_container/ptr_vector.hpp>
class Test {
int i;
public:
Test(int j) : i(j) {}
~Test() { std::cout << "~Test(" << i << ") is called" << std::endl; }
};
int main()
{
boost::ptr_vector<Test> ptt;
for (int i = 0; i < 10; i++)
ptt.push_back(new Test(i));
boost::ptr_vector<Test>().swap(ptt);
std::cout << "Excecution done" << std::endl;
}

~Test(0) is called
~Test(1) is called
~Test(2) is called
~Test(3) is called
~Test(4) is called
~Test(5) is called
~Test(6) is called
~Test(7) is called
~Test(8) is called
~Test(9) is called
Excecution done